Hi Meghana, [auto build test ERROR on drm/drm-next] [also build test ERROR on v4.14-rc2 next-20170929] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Meghana-Madhyastha/drm-tinydrm-drm_of_find_backlight-helper/20170930-122931 base: git://people.freedesktop.org/~airlied/linux.git drm-next config: x86_64-randconfig-x017-201739 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 Note: the linux-review/Meghana-Madhyastha/drm-tinydrm-drm_of_find_backlight-helper/20170930-122931 HEAD 4dc8fd20ad41e923832dc78cf4d8e7f98c0fedb9 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): drivers/gpu/drm/tinydrm/mi0283qt.c: In function 'mi0283qt_probe': >> drivers/gpu/drm/tinydrm/mi0283qt.c:192:20: error: implicit declaration of function 'devm_drm_of_find_backlight' [-Werror=implicit-function-declaration] mipi->backlight = devm_drm_of_find_backlight(dev); ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/tinydrm/mi0283qt.c:192:18: warning: assignment makes pointer from integer without a cast [-Wint-conversion] mipi->backlight = devm_drm_of_find_backlight(dev); ^ cc1: some warnings being treated as errors vim +/devm_drm_of_find_backlight +192 drivers/gpu/drm/tinydrm/mi0283qt.c 163 164 static int mi0283qt_probe(struct spi_device *spi) 165 { 166 struct device *dev = &spi->dev; 167 struct mipi_dbi *mipi; 168 struct gpio_desc *dc; 169 u32 rotation = 0; 170 int ret; 171 172 mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL); 173 if (!mipi) 174 return -ENOMEM; 175 176 mipi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 177 if (IS_ERR(mipi->reset)) { 178 dev_err(dev, "Failed to get gpio 'reset'\n"); 179 return PTR_ERR(mipi->reset); 180 } 181 182 dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); 183 if (IS_ERR(dc)) { 184 dev_err(dev, "Failed to get gpio 'dc'\n"); 185 return PTR_ERR(dc); 186 } 187 188 mipi->regulator = devm_regulator_get(dev, "power"); 189 if (IS_ERR(mipi->regulator)) 190 return PTR_ERR(mipi->regulator); 191 > 192 mipi->backlight = devm_drm_of_find_backlight(dev); 193 if (IS_ERR(mipi->backlight)) 194 return PTR_ERR(mipi->backlight); 195 196 device_property_read_u32(dev, "rotation", &rotation); 197 198 ret = mipi_dbi_spi_init(spi, mipi, dc); 199 if (ret) 200 return ret; 201 202 ret = mipi_dbi_init(&spi->dev, mipi, &mi0283qt_pipe_funcs, 203 &mi0283qt_driver, &mi0283qt_mode, rotation); 204 if (ret) 205 return ret; 206 207 ret = mi0283qt_init(mipi); 208 if (ret) 209 return ret; 210 211 /* use devres to fini after drm unregister (drv->remove is before) */ 212 ret = devm_add_action(dev, mi0283qt_fini, mipi); 213 if (ret) { 214 mi0283qt_fini(mipi); 215 return ret; 216 } 217 218 spi_set_drvdata(spi, mipi); 219 220 return devm_tinydrm_register(&mipi->tinydrm); 221 } 222 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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